Speed-varying transmission.



F. H. CHEYNB.

SPEED VARYING TRANSMISSION. APPLICATION mum AUG. 16, 1909.

950,368. Patented Feb.22, 1910.

4 SHEETBBHEET 1.

I Snfiewioi GWWMMM T-aderick H. Cbgyn wea /new F. H. CHEYNB.

SPEED VARYING TRANSMISSION.

APPLIUATION FILED AUG.

I @nucnfo'c Fredenck H. Chgyne. 9%"

vihwaaca F. H. GHEYNE.

SPEED VARYING TRANSMISSION.

APPLICATION FILED AUG. 16, 1909.

Patented Feb. 22, 1910.

4 SHEETS-SHEET 4.

3110c nfo'a Frederzck H. Chgyne GHoznu o UNITE FREDERICK H. GHEYNE, F INDIANAPOLIS, INDIANA.

SPEED-VARYING TRANSMISSION.

Specification of Letters Patent.

Application filed August 16, 1909. Serial No.. 513,054.

To all whom it may concern:

..ments carried by the drivin Be itknown that I, FREDERICK H. CHEYNE, a citizen. of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Speed-Varying Transmission, of which the following is a. specification.

The object of my invention is to produce a speed varying transmission mechanism by means of which any desired variation of speed between a driving member and a driven member may be obtained by a variation of circulation of a practically incompressible liquid between the driving and driven in ambers. It has heretofore been proposed to produce a mechanism of this kind and a fair illustration of the type of such a construction is to be found in Patent No. 912,487 issued Feb. 2, 1909, to P. M. Ramsey. In such a construction the flow of liquid produced by the interaction of one set of elemember and another set of elements carrie by the driven member, is supposedly controlled by means of valves arranged in the line of flow,but in practice it is found that it is practically impossible to provide an ordinary valve mechanism by means of which the flow can be controlled with any degree of certainty or with a nicety of variation. It is ,for that reason that I have abandoned all valve mechanism and, instead, have rovided measuring receptacles to definitely etermine and measure the circulation of the controlling fluid.

The accompanying drawings illustrate my invention.

Figure 1 is an axial section of a mechanism embodying my invention; Fig. 2 a

section on line 22 of Fig. 1; Fig. 3 a sec-- tion on line 3-3 of Fig. 1; Fig. 4 an axial section of another formof my invention, and Fig. 5 a section on line 55 of Fig. 4.

In the drawings, 10 indicates a rotatable pulley-like casing and 11 a shaft 11 on which the casing 10 is journaled. In he further description the casin 10 may be referred to as the driving mem her or driver, and the shaft 11 as the driven member. The casing 10 is hollow and so mounted upon shaft 11 as to be freely rotatable thereon, as fluidti ht. Mounted within casing 10 is a series 0 motor cylinders 12 and a series of measuring cylinders 13. Mounted within each motor cylinder 12 is a piston 14 and mounted within. each measuring cylinder 13 is a piston 15. Leading from each cylinder 12 is a passa e 16 which communicates wit-h a valve cham er 17 having a passage 18 which forms a communication with the lnterior of casing 10, and also having a passage 19 which forms a communication with an intermediate equalizing chamber 21 formed within casing 10 but having no direct communication with Snnilarly, each eylthe interior thereof. inder 13 is provided with a passage 22 which forms a communication between its cylinder and the valve chamber 23 which is provided with a passage 24, giving access to the interior of casing 10, and a passage 25 giving access to the chamber 21. Mounted in each Valve chamber 17 is a valve 26 having a por tion 26 which may be brought into position to shift communication from passage 16 to pitssage 18 or from passage 16 to passage 19.

ounted in each valve chamber 23 is a valve 27 which is provided with a portion 27' which is adapted to shift communication between passage 22 and passage 24 or passage 22 and assage 25. Secured to or formed integral with shaft 11 in alinement with cylinders 12 is an eccentric 31, and in alinement with valve chamber 17 is an cecentric 32. Sleeved upon shaft 11 is a Sleeve 33 which, at its inner end carries-an eccentric 34. which is in alinement with valve chambers 23. Sleeve 33 is provided at its outer end with a lever 35 by means of which it may be rocked upon shaft 11. Sleeved upon sleeve is a sleeve 36 provided at its outer end with an operating lever 37 and at its inner end with an eccentric 38 upon which is sleeved an eccentric ring 39, the eccentricity of the eccentrics 38 and 39 being equal to half the eccentricity of eccentric 31 so that, when added together they will have an eccentric value equal to the eccentric 31, but, when opposed to each other, will have a resultant wlnch is concentric with shaft 11. Thus far the mechanism illustrated in Figs. 1, 2 and 3 is the same asthe mechanism illustrated in Figs. 4 and 5.

Turning now to Figs. 1, 2 and 3 it will be seen that two diametrically opposed pistons 14 are rigidly carried by a cross head frame 41 having a guideway 42 therein at right angles to the axis of the two pistons 14: which it carries. Slidably mounted in' its guideway is a block 43 which is journaled ulpon eccentric 31. a y opposed pistons 14: are carried by a similar cross head 44 which is provided with a Patented Feb. 22, 1910.

The other two diametricguideway 45 lying at right angles to the axis of these pistons 14, and therefore at right angles to the other guideway 42, and the block 43 is also arranged in its guideway 45. For the sake of compactness the cross head 44 is mounted within the slot or guideway 46 formed within cross head 41. Mounted upon eccentric 32 is a square block 51 upon which is slidably mounted, a cross head 52 which carries two diametrically opposed valves 26, and a cross head 53 which similarly carries the other two diametrically opposed valves 26. Similarly a square block 54 is mounted upon an eccentric ring 39 and carries, a cross head 55 which carries two diametrically opposed pistons 15, and a cross head 56 which carries the other two diametrically opposed pistons 15. Mounted upon eccentric 34 is a square block 57 upon which is slidably mounted a cross head 58 carrying two of the valves 27 and a cross head 59 carrying the other two of the valves 27. For the purpose of adjusting the eccentric ring 39 relative to the eccentric 38, in either form shown, eccentric 34 or sleeve 33, is provided with a radial slot 61 in which is mounted a block 62 which is journaled upon a pin 63 carried by the eccentric ring 39.

In the form shown in Figs. 4 and 5 the eccentric 31 carries an eccentric strap- 71 to which is connected a series of 'pitmen 72 which extend to the several pistons 14, one of said pitmen being rigidly connected to the strap 71 while the rest are pivotally connected thereto. All of the pitmen are pivotally connected to their respective pistons. Similarly the eccentric ring 39 carries an eccentric strap 73 to which is connected a series of pitmen 74which extend to the sev eral pistons 15. The eccentric 34 is rovided with an annular flange 34 which is straddled by rollers 76 carried by the valves 27 and eccentric 32 is provided with a similar annular flange 32 which is similarly straddled by rollers 77 carried by the valves 26.

The operation is as follows: The entire interior of the casing 10, including all of the cylinders, valve chambers, passages, and chamber 21, is filled with a fluid, preferably an incompressible liquid such as a high grade of lubricating oil. Force is applied to casing 10, by means of a belt, train of gearing, or other driver, to rotate it, and lever 35 is anchored against movement. If the eccentric ring 39 is located upon eccentric 38 so as to'produce a maximum eccentricity, .and movement of shaft 11 is resisted by an applied load, pistons 14 will be reciprocated in cylinder 12 and, valves 26 will be recipro cated in their chambers so that oil will be caused to flow from the interior of shell 10 through passages 18 and 16 into cylinders 12 and from said cylinders through passages16 and 19 into chamber 21 and from thence through passages 25 and 22 into cylinders 13 and from thence through passages 22 and 24 back into casing 10 and thence through passages 18 etc. The eccentricity of the combined eccentrics 38 and 39 being equal to the eccentricity of eccentric 31, and the pistons 15 being of the same size as the pistons 14, there will be a free circulation 0. oil through the system and consequently no material pressure will be exerted by the piston 14 on eccentric 31 and therefore there will be no rotation of shaft 11. Of course if the free circulation of the oil is not permitted,.by reason of the shape of the various passages etc., there may possibly be a very slight movement of shaft 11 but a proper construction of the parts will prevent movement. If now arm 37 be swung so as to rotate eccentric 38 within ring 39 the position of the eccentrics relative to the cylinders 13 will not be changed but the amount of eccentricity will be diminished and consequently the stroke of the pistons 15 will be diminished so that for a given number of strokes of pistons 15, c'. e. for av given number of rotations of shell 10, a fewer number of strokes of pistons 14 will be re- I quired and a resistance will be offered to the free circulation of oil from cylinders 12 and this resistance acting through the connections between the pistons. 14 and shaft 11 will cause a rotation of shaft 11 in the direction of rotation of casing 10, the" amount of this rotation approximating, to a greater or less extent, the amount of rotation of the casing 10, depending upon'the adjustment of the compound eccentric 3839, the speed of shaft 11 reaching the speed of casing 10 whenever the eccentricity of the compound eccentric 3839 is reduced to zero at which time allreciprocation of the piston 15 is prevented, thus preventing any circulation of oil from one set of cylinders to the other, the parts being at this time locked together. It is true that, at this time, there will be a continued reciprocation of the valves 27 but this will result merely in a slight circulation of oil between the outer ends of the valve chambers 23 throughv the interior of casing 10. I I

, I claim as my invention 1. The combination of a driving member and a driven member, a set of fluid pumps, one element of said pumps connected to the driver and the other element of said pumps connected to' the driven member, a set of measuring pumps, one of the elements thereof being connected to the driving member, connections between the fluid pumps and the measuring pumps and return connections between the measuring pumps and the fluid pumps, and means for varying the stroke 2 of one set of pumps.

2. The combination of a driving member and a driven "member coaxial therewith, a set of fluid pumps, one element of said pumps connected to the driver and the other element -pumps and the measuring pumps and return connections between the measuring pumps and the fluid: pumps, and means for varying the stroke of'one set of pumps.

3. The combination of a drivin member and a driven member, a set of fluid pumps, one element of said pumps connected to the driver and the other element of said pumps connected to the driven member, a set of measuring pumps, one of the elements thereof being connected to the driving member, connections between the fluid pumps and the measuring pumps and return connections between the measuring pumps and the fluid pumps, and means for varying the stroke of the measuring pumps.

4. The combination of a driving member anda driven member coaxial therewith, a set of fluid pumps, one element of said pumps connected to the driver and the other element of said pumps connected to the driven member, a set of measuring pumps, one of the elements thereof being connected to the driving member, connections between the fluid pumps and the measuring pumps and return connections between the measuring pumps and the fluid pumps, and means for varying the stroke of the measuring pumps.

5. The combination of a driven shaft, a hollow fluid containing driving casing journaled on said shaft, a set of fluid pump cyl-' inders arranged within said casing, a set of pistons cooperating with said cylinders and eccentrically connected to the shaft, a set of measuring cylinders mounted within the easing, a set of cooperating pistons eccentrically supported on the shaft, and connections between each set of cylinders and the interior of the casing and between the two sets of cylinders. I

6. The combination of a driven shaft, a hollow fluid containing driving casing j ournaled on said shaft, a set of fluid pump cylinders arranged within said casing, a set of pistons cooperating with said cylinders and eccentrically connected to the shaft, a set of measuring cylinders mounted within the easing, a set of cooperating pistons eccentrically supported on the shaft, connections between each set of cylinders and the interior of the casing and between the two sets of cylinders and means for varying the eccentricity of the connection of one set of pistons with the shaft.

7. The combination of a driven-shaft, a hollow fluid containing driving casing journaled on said shaft, a set of fluid pump cylinders arranged within said casing, a set of pistons cooperating with said cylinders and eccentrically connected to the shaft, a

set of measuring cylinders mounted within the casing, a set of cooperating pistons eccentrically supported on the shaft, connections between each set of cylinders and the interior of the casing and between the two sets of cylinders, and means for varying the eccentricity of the connection between the measuring pistons and the shaft.

8. The combination of a driven shaft, a hollow fluid containing driving casing journaled on said shaft, a set of fluid pump cylinders arranged within said casing, a set of pistons cooperating with said cylinders and eccentrically connected to the shaft, a set of measuring cylinders mounted within the cas-. ing, a set of cooperating pistons eccentrically supported on the shaft, connections between each set of cylinders and the interior of the casing and between the two sets of cylinders, and valves for controlling the connections between the two sets of cylinders and between each set of cylinders and the interior of the casing.

9. The combination of a driven shaft, a hollow fluid containing driving casing journaled on said shaft, a set of fluid pump cylinders arranged within said casing, a'set of pistons cooperating with said cylinders and eccentrically connected to the shaft, a set of measuring cylinders mounted within the casing, a set of cooperating istons eccentrically supported on the sha t, connections between each set of cylinders and the interior of the casing and between the two sets of cylinders, means for varyingthe eccen- 100 tricity of the connection of one set of pistons with the shaft, and valves for controlling the connections between the two sets of cylinders and between each set of cylinders and the interior of the casing.

10. The combination of a driven shaft, a hollow fluid containing drivin casing journaled on said shaft, a set 0 fluid pump cylinders arranged within said casing, a set of pistons cooperating with said cylin- 11 0 ders and eccentrically connected to the shaft,

a set of measuring cylinders mounted within the casing, a set of cooperating istons eccentrically supported on the sha t, connections between each set of cylinders and the 115 interior of the casing and between the two sets of cylinders, means for varying the eccentricity of the connection between the measuring istons and the shaft, and valves for control in the connections between the 120 two sets of cylmders and between each set of cylinders and the interior of the casing.

11. The combination of a driven shaft, a fluid containing driving casing journaled thereon, a set of cylinders mounted within 125 said casing, a set of cooperating pistons eccentrically connected to the shaft, a second set of cylinders, a second set of pistons cooperating with said second set of cylinders,

a compound eccentric arranged between said 130 second set of pistons and the shaft, meanssaid driving casing, a set of cooperatingpistons eccentrically connected tothe shaft, a second set of cylinders, a second set of pistons cooperating with said second setof cylinders,,a compound eccentric arranged between said second set of pistons and the shaft, means for rotating one of the members of said compound eccentric relative to the other to vary the effective eccentricity of the compound eccentric, and fluid circulating connections between the two sets of cylinders, and between each set. of cylinders and the interior of the casing.

13. The combination of a driven shaft, a

fluid containing driving casing journaled thereon, a set of cylinders mounted within said casing, a set ofcooperating pistons eccentrically connected to the shaft, a second set of cylinders, a' second set of pistons cooperating with said second set of cylinders, a compound eccentric arranged between said second set of pistons and the shaft, means for rotating one of the members of said compound eccentric relative to the other to vary the effective eccentricity of the compound eccentrlc, fluid circu ating connections between the two sets of cylinders and the casing, a set of valves arranged adjacent the first mentioned set of cylinders to alternately connect the same with the interior of the casing and with an intermediate chamber, operating connections between said valves and the shaft, a second set of valves arranged adjacent the second set of cylinders to alternately connect; the same'with the interi-onof the chamber and with the intermediate chamber, and operating connections between said valves and the shaft.

In witness whereof, I havehereunto set my hand and seal at Indianapolis, Indiana, this thirteenth day of August, A. D. one thousand nine hundred and nine.

FREDERICK H. OHEYNE. [n 8.]

Witnesses:

ARTHUR M; Hoon,

THOMAS W. MOMEANS.- 

